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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 672 (Four-Wheel Drive Systems - Excursion & F250-F550 Super Duty) >> Diagnosis And Testing >> Four-Wheel Drive Systems - Mechanical Shift >> Principles of Operation >> Mechanical Operation

Mechanical Operation

WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2004 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

In the 2WD mode, torque from the engine is transferred through the transmission to the transfer case, which in turn drives the output shaft that drives the rear axle.

The 2WD to 4X4 shift is accomplished when the 2WD to 4X4 shift fork moves the mode sleeve to engage the drive sprocket to the rear output shaft. The drive sprocket turns the chain which turns the front output shaft driven sprocket on the front output shaft and the front driveshaft.

The 4X4 to 4X4 LOW shift is accomplished when the 4X4 to 4X4 LOW shift fork moves the range sleeve to engage the planet carrier to the main shaft. Torque for the input shaft is then transmitted through the sun gear, which then turns the planets. The planets, which are now engaged to the output shaft, provide a gear reduction.

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